Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh hau che snippets" » "danh dau che snippets", "danh cau che snippets", "doanh chau che snippets", "danh han che snippets", "danh phap che snippets", "danh phan che snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("danh hau che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh hau che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh hau che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh hau che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.